6121654081 has 3 divisors (see below), whose sum is σ = 6121732323. Its totient is φ = 6121575840.

The previous prime is 6121654067. The next prime is 6121654111. The reversal of 6121654081 is 1804561216.

The square root of 6121654081 is 78241.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 5997108481 + 124545600 = 77441^2 + 11160^2 .

It is not a de Polignac number, because 6121654081 - 2³¹ = 3974170433 is a prime.

It is a super-2 number, since 2×6121654081² = 74949297374847909122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6121654001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39121 + ... + 117361.

It is an arithmetic number, because the mean of its divisors is an integer number (2040577441).

Almost surely, 2^6121654081 is an apocalyptic number.

6121654081 is the 78241-st square number.

6121654081 is the 39121-st centered octagonal number.

It is an amenable number.

6121654081 is a deficient number, since it is larger than the sum of its proper divisors (78242).

6121654081 is an frugal number, since it uses more digits than its factorization.

6121654081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156482 (or 78241 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The cubic root of 6121654081 is about 1829.3196313203.

The spelling of 6121654081 in words is "six billion, one hundred twenty-one million, six hundred fifty-four thousand, eighty-one".